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  2. Coplanarity - Wikipedia

    en.wikipedia.org/wiki/Coplanarity

    In geometry, a set of points in space are coplanar if there exists a geometric plane that contains them all. For example, three points are always coplanar, and if the points are distinct and non-collinear, the plane they determine is unique. However, a set of four or more distinct points will, in general, not lie in a single plane.

  3. Parallel (geometry) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(geometry)

    the distance between the two lines can be found by locating two points (one on each line) that lie on a common perpendicular to the parallel lines and calculating the distance between them. Since the lines have slope m , a common perpendicular would have slope −1/ m and we can take the line with equation y = − x / m as a common perpendicular.

  4. Projective geometry - Wikipedia

    en.wikipedia.org/wiki/Projective_geometry

    (L3) at least dimension 2 if it has at least 3 non-collinear points (or two lines, or a line and a point not on the line), (L4) at least dimension 3 if it has at least 4 non-coplanar points. The maximum dimension may also be determined in a similar fashion. For the lowest dimensions, they take on the following forms. A projective space is of:

  5. Skew lines - Wikipedia

    en.wikipedia.org/wiki/Skew_lines

    After the first three points have been chosen, the fourth point will define a non-skew line if, and only if, it is coplanar with the first three points. However, the plane through the first three points forms a subset of measure zero of the cube, and the probability that the fourth point lies on this plane is zero.

  6. Lami's theorem - Wikipedia

    en.wikipedia.org/wiki/Lami's_theorem

    In physics, Lami's theorem is an equation relating the magnitudes of three coplanar, concurrent and non-collinear vectors, which keeps an object in static equilibrium, with the angles directly opposite to the corresponding vectors.

  7. PCB congener list - Wikipedia

    en.wikipedia.org/wiki/PCB_congener_list

    These 68 coplanar congeners fall into one of two groups. The first group of 20 congeners consists of those with chlorine substitution at none of the ortho positions on the biphenyl backbone and are referred to as CP0 or non-ortho congeners.

  8. Amy Robach Says T.J. Holmes Asked Her to 'Never Propose ...

    www.aol.com/lifestyle/amy-robach-says-t-j...

    Amy Robach knows that T.J. Holmes wants to be the one to pop the question.. While answering fan questions on the Dec. 8 episode of their Amy & T.J. podcast, the former GMA3: What You Need to Know ...

  9. Hyperbolic geometry - Wikipedia

    en.wikipedia.org/wiki/Hyperbolic_geometry

    The difference between them is that they represent different coordinate charts laid down on the same metric space, namely the hyperbolic plane. The characteristic feature of the hyperbolic plane itself is that it has a constant negative Gaussian curvature , which is indifferent to the coordinate chart used.